Description

Di-2-Naphthylthiocarbazone is a specialized organic reagent belonging to the thiocarbazone class, known for its strong chelating properties with various metal ions. Its primary value lies in its application as a highly selective chromogenic agent for the spectrophotometric determination and extraction of specific metals in analytical chemistry. This compound is essential for quality control laboratories, research institutions, and industrial facilities involved in environmental monitoring, metallurgy, and pharmaceutical analysis where precise metal quantification is critical.

Application

• Spectrophotometric Reagent: Used as a sensitive and selective colorimetric reagent for the determination of trace metals like lead, cadmium, and bismuth.
• Analytical Chemistry: Employed in the development of analytical methods for metal ion detection and quantification in complex matrices.
• Environmental Testing: Applied in the analysis of water, soil, and industrial waste samples for heavy metal contamination.
• Metallurgical Analysis: Utilized for the assay and impurity profiling of ores, alloys, and refined metals.
• Liquid-Liquid Extraction: Acts as a complexing agent for the selective separation and pre-concentration of metal ions from solutions.
• Research & Development: Serves as a key intermediate or reagent in chemical synthesis and coordination chemistry studies.
• Pharmaceutical Impurity Testing: Potentially used in testing for metallic catalyst residues in active pharmaceutical ingredients (APIs).

Basic Information

Item	Details
Product Name	Di-2-Naphthylthiocarbazone
CAS No.	27766-21-8
Molecular Formula	C21H16N4S
Molecular Weight	356.44 g/mol
Synonyms	Bis(2-naphthyl)thiocarbazone; Dithizone, di-2-naphthyl-; 2-Naphthalenecarbothiohydrazide, 2-naphthyl-; 1,5-Di(2-naphthyl)thiocarbazone; 1,5-Bis(2-naphthyl)thiocarbazone; Di-β-naphthylthiocarbazone; Lead reagent (specific grade); Contact for additional trade names.
EINECS	Contact for details

Quality Control

Our Di-2-Naphthylthiocarbazone is manufactured under strict quality management systems. Each batch undergoes rigorous analytical testing, including HPLC for purity and spectrophotometric validation of its functional performance as a metal-complexing agent. We provide comprehensive Certificates of Analysis (COA) detailing all specifications to ensure it meets the stringent requirements for analytical reagent applications.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated place at room temperature (typically 15-25°C). This material is light-sensitive and should be handled accordingly to maintain stability and performance.

Specification

Item	Specification
Appearance	Dark brown to black crystalline powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Melting Point	Contact for details
Loss on Drying	≤ 0.5%
Residue on Ignition	≤ 0.1%
Functional Test (Metal Complexation)	Conforms to reference standard

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.